VIENNA, July 2. /TASS/. The foreign ministers of France, Germany, UK and China will join the final round of talks on Tehran’s nuclear program in Vienna on Thursday. US State Secretary John Kerry and Iranian Foreign Minister Javad Zarif have already arrived in the Austrian capital.

A diplomatic source participating in the talks confirmed to TASS that ministerial meetings in different formats will mostly focus on conditions for lifting sanctions from Tehran. "Sanctions will be in the center of attention," the source said.

Restrictive measure introduced by US and EU will be "suspended" after the International Atomic Energy Agency (IAEA) confirms that Iran fulfilled all commitments that it undertook concerning its nuclear program. However, the Lausanne agreements are sketchy, and all other issues connected with sanctions - how fast and in what order they will be removed, what the mechanism of returning sanctions will be in case Iran violates the agreement - need further coordination.

The process of coordinating the draft final agreement has already been completed by experts. "The draft with brackets that reflect all disputable issues was handed over to political directors," a source in one of delegations told Iranian journalists. After political directors work "some more on the text," the draft document will be handed over to foreign ministers. The deadline for signing the comprehensive agreement on Tehran’s nuclear program has been extended until July 7.